SOLVED What signal to react on when QTabWidget is first displayed?

Anonymous_Banned275

As a result of MDI menu selection I run QTabWidget.
I would like to process default tab without user interaction.
Is there a signal I can detect such as "default tab activated " ?
I can probably figure out how to detect the MDI signal, but do not see how to detect "default tab" activated".

JonB

@AnneRanch
Usually when user clicks on tab you get currentChanged(int) signal, so that would be first thought. However, I am not sure whether you get this when QTabWidget shown for the first time, I don't know whether that generates a "tab changed" or not. So try on currentChanged and come back if that does not work?

Anonymous_Banned275

@JonB said in What signal to react on when QTabWidget is first displayed?:

currentChanged(int)
Yes, that is emitted when tab is changed using mouse.
I 'll looking into MDI signals.

SGaist

Hi,

There's no such signal. That's typically a use case that you need to implement yourself.

Can you describe what exactly you do with that menu and how it is related to the QTabWidget ?

Anonymous_Banned275

Here is the menu code creating the form.

I think one way to create "signal" could be
FW->activateWindow();

I am working in that...

Definitely not "out of the box" process..,
The task is to at least fill ONE widget in the default tab.

I have it working manually - using button push.
The idea is to automate it when the default tab is activated.
I know I can option which tab will be set as default - maybe I can use that...




void MainWindow::Run_HCI(void)
{
    qDebug() << "\nTASK     : " << "\nCreate START child as QMdiSubWindow \n" <<
                "\nFile     : " << (__FILE__) <<
                "\nFunction : " << (__FUNCTION__) <<
                "\n@line    : " <<(__LINE__);

    //MdiChild_ORIGINAL *child = createMdiChild();
    //child->show();
    // duplicate Form_Widget Nov 3 did noit work - need build from scrach
     // Form_Widget *FW = new Form_Widget();

Form_Widget_HCI *FW = new Form_Widget_HCI();
//FW->ui.
//FW->activateWindow();

    QRect dimensions = FW->geometry();
    int x = dimensions.height();
    int y = dimensions.width();
    //HERE
    //int start_X = dimensions.x2;
    //QMdiArea mdiArea; reusing child
    QMdiSubWindow *child = new QMdiSubWindow(FW);
    //subWindow1->setWidget(internalWidget1);
    child->setAttribute(Qt::WA_DeleteOnClose);
    child->setWindowTitle(__FILE__);
    // add to main area
    mdiArea->addSubWindow(child);
    // adjust subwindow size to display just TAB   plus someting
    //QRect dimensions = FW->geometry();
    // void QRect::getCoords(int *x1, int *y1, int *x2, int *y2) const
    //QPoint QRect::bottomRight() const

#ifdef BYPASS

    @AnneRanch

            void QRect::getCoords(int *x1, int *y1, int *x2, int *y2) const

            QPoint QRect::bottomRight() const
            &
            int QPoint::x() const


#endif

            //    QString height = FW->tab_height.toNumber();
            //   qDebug(height);


            // Temp MN QTTab
            //    child->setFixedHeight(1000);
            //    child->setFixedHeight(1000);
            //   QRect dimensions = FW->geometry();
            //   int start_X = dimensions.x2;


            int test = FW->tab_height/20000/100;
    child->setFixedHeight(test ); // FW->tab_height/20000);
    child->setFixedHeight(x -100 ); //display outside TAB (?)
    child->setFixedWidth(y) ;
    // activate widget
    child->setWidget(FW);
    child->showNormal();

    qDebug() << "\nTASK     : " << "\nCreate END child as QMdiSubWindow \n" <<
                "\nFile     : " << (__FILE__) <<
                "\nFunction : " << (__FUNCTION__) <<
                "\n@line    : " <<(__LINE__);



}

SGaist

@AnneRanch said in What signal to react on when QTabWidget is first displayed?:

Form_Widget_HCI

Is that the widget you are talking about ?
What kind of initialisation do you want to do ?

JoeCFD

override the following func.
protected:
void showEvent(QShowEvent *) override;

inside this func, you can query current tab index.

Anonymous_Banned275

I have a combo box in default tab and like to "fill it" from a text file.

SGaist

Why not do that in the constructor of that widget ?

Anonymous_Banned275

@SGaist said in What signal to react on when QTabWidget is first displayed?:

Why not do that in the constructor of that widget ?

SOLVED
Purfect, you get a gold star....

Anonymous_Banned275

@JoeCFD said in What signal to react on when QTabWidget is first displayed?:

override the following func.
protected:
void showEvent(QShowEvent *) override;

inside this func, you can query current tab index.

Maybe I can modify this to solve my other issue.
Thanks